Instrument JRuby

Otherwise, if your application has no transactions and you are using JRuby, you will not be able to see your CPU metrics. This was due to a bug in JRuby, where Process.times returned wall clock time instead of elapsed CPU time. That bug was fixed as of New Relic’s Ruby agent 3.6.8.164 and JRuby 1.7.0.

Ruby versions not supported

End of life notification: As of January 26, 2015, New Relic will no longer accept data from Ruby agent versions earlier than 3.5.3.

These agent versions use an out-of-date protocol when communicating with New Relic's data collection services, and many also contain a potential security issue where they may incorrectly send sensitive data to the New Relic collector.